Parks Canada issues blue-green algae advisory for Waskesiu Lake

People enjoy the water in Waskesiu Lake on Friday, August 29, 2025. (Jasmine Pelletier/CTV News)

Parks Canada has issued a public advisory alerting Waskesiu Lake visitors about the potential presence of blue-green algae.

The advisory issued Friday, says the algae may also be present in other areas of the park.

The algae produces a toxin (poison) that can cause serious illness to animals and humans who drink or have skin contact with water containing this toxin.

Symptoms of blue-green algae poisoning in humans may include fever, headache, dizziness, stomach cramps, vomiting, diarrhea, skin and eye irritation, sore throat, and swollen lips.

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While symptoms are typically short-lived, lasting only two to three days, the toxin can be fatal to animals such as dogs and cattle that ingest it.

Visitors are advised to avoid drinking from or allowing their pets to drink the affected water source, swimming or allowing their pets to swim or wade in the affected water source and contact with blue-green algae dried on the shorelines.

If you suspect a blue-green algae-related health concern, Parks Canada says contact your healthcare provider.